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United States Patent | 5,008,511 |
Ross | April 16, 1991 |
A plasma torch incorporated at plurality of arc forming chambers arranged symmetrically about an axis and each containing a first electrode. A common electrode cooperates with the electrode in each chamber to form an arc in each chamber and is provided with converging passages leading one from each chamber and converging into a common nozzle passage extending along the axis. A reactant feed passage opens into the common nozzle passage co-axial with the nozzle passage in a region of convergence of the converging passages to inject reactants into the center of the plasma jet formed in the nozzle passage in the direction of movement of the plasma jet through the nozzle passage.
Inventors: | Ross; Douglas A. (Richmond, CA) |
Assignee: | The University of British Columbia (CA) |
Appl. No.: | 543403 |
Filed: | June 26, 1990 |
Current U.S. Class: | 219/121.48; 219/75; 219/121.47; 219/121.5; 219/121.52 |
Intern'l Class: | B23K 009/00 |
Field of Search: | 219/121.48,121.5,121.43,121.52,121.39,75,76.16,76.15 427/34 |
3578943 | May., 1971 | Schoumaker | 219/121. |
3625660 | Dec., 1971 | Reed et al. | 219/121. |
3770935 | Nov., 1973 | Tateno et al. | 219/121. |
4361441 | Nov., 1982 | Tylko | 219/121. |
4818837 | Apr., 1989 | Pfender | 219/121. |
4855563 | Aug., 1989 | Beresnev et al. | 219/121. |
Metco Type 3APG Advanced Plasma Gun brochure by Metco a division of Perkin Elmer. Jet Kote Surfacing System ILA a brochure by Stellite Coatings. Hypersonic Plasma Jet Coating System a brochure by Plazjet Ltd. Hypersonic Spray System a brochure by Whitco. |